fixes #152 hopefully

node: Allow OVSSwitch to run in userspace mode

This adds a datapath parameter to OVSSwitch which allows one to tell OVS to
run in userspace mode rather than kernel mode.  From the commandline, this
is --switch=ovsk,datapath=user.

Note that this makes "ovsk" and the OVSKernelSwitch alias misnomers.  Since
the default behavior is still kernel mode, this is hopefully harmless.

This is the second version of this patch, which changes the argument name
and values according to Bob's suggestion.

The previous version (12-05-16) does not compile on Ubuntu 12.10.

Also use a local variable to reduce duplication.

fixes #144

fixes #142

Fix method name mismatch for setDefaultRoute. 
This seems to be logically correct according to the intention of the code, but it may cause some trouble because routes will now be flushed by Mininet.configHosts().

Fixes #130

tiny fix to vm script

Conflicts:

	util/install.sh

closes #100

fixes #139

This should fix the problem of dump-flows not showing the OpenFlow
flow table flows and only showing cached kernel flow table flows.

fixes #136

should fix #128

fixes #128

fixes #127

Adjust numbering to support tc-based switch QoS

This looks fine to me - probably we want to change the way this works eventually, but for now renumbering it is fine and we can change the numbering later if desired.

both the reference switch and Open vSwitch assume ids with major 1
can be used for tc-based QoS

This may or may not be the right thing to do - an alternative
would be to ignore SIGINT, but that would make the popen()
job unkillable by normal means! So we'll try this and see
how well it works.
Fixes #124

In the future we may wish to enable moving interfaces across
nodes which are not in the root NS, and this would provide
the low-level mechanism to do so.
closes #122

Try invoking bash processes with -s mininet:host,
for easy identification of hosts. This enables
easy attachment using the util/m script.
closes #121

For local display, allow local root access
For remote display, tunnel with socat/mnexec
This should enable *wireshark in hosts* and fix #119

Signed-off-by: Bob Lantz <rlantz@cs.stanford.edu>

closes #85

tools/install.sh: catch up oftest change
Looks fine to me.

Since oftest removed tools/munger directory, install.sh fails as follows
> mininet/util/install.sh: line 399: cd: tools/mnuger: No such file or directory

oftest change set
> commit be8503a69d609d0aee844a91f3f5d66f4e2666c7
> Author: Rich Lane <rlane@bigswitch.com>
> Date:   Tue Mar 12 10:16:33 2013 -0700
>
>     remove pylibopenflow tools

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

thanks to Brian O'Connor for reminder + suggestion
closes #114